ELECRAFT K3, Руководство пользователя

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Remote Control of the K3
With appropriate software, any computer with an
RS232 port (or a USB-to-RS232 adapter) can be
used to control the K3. Connections needed for
RS232 communications are covered on pg. 18.
Third-party logging and contesting software is
available for various computers and operating
systems. Most applications written for the K2
should work with the K3, and some provide K3-
specific features.
For a list of K3-compatible software applications,
including configuration requirements, please visit
www.elecraft.com/K3/k3_software.htm
Remote-Control Commands
The K3 has a rich set of remote-control commands,
including many commands that directly controlthe
two DSPs. With appropriate software, various
extensions to DSP functionality can be made
available to the operator, including customized
filters, fine control over noise reduction, per-mode
parametric EQ, absolute level metering in dB, and
unique tuning aids.
K3 remote-control commands use ordinary ASCII
text, so they can be easily tested using a terminal
emulator
. For e xa mpl e, t he comma nd “
FA;
” r e t ur ns
the current VFO A frequency. Using the same
command, you can
set the VFO A frequency, e.g.
“
FA00007040000;
” s et s t he VFO t o 7. 040 MHz.
Many new commands are provided in addition to
the core set of commands supported by the K2.
Some existing commands have been updated to
di r ect l y cont r ol t he s ub r ecei ver ( e. g. , “
AG$;
”,
which controls sub AF gain). Please refer to the K3
Pr ogr ammer ’ s Ref er ence
for further details.
Panadapter/Spectrum Scope Control
The K3’ s “
FI;
” r e mot e
-control command can be
used from a panadapter (also known as a spectrum
scope) to determine the exact frequ
ency of t he K3’ s
first I.F. T his can automatically compensate for
crystal filter offsets, passband shift, etc.
Remote Power On/Off
A remote-control system can pull the POWER ON
line to ground (ACC connector, pg. 18) to turn the
K3
O N . To turn it O FF , the controller must send
t he K3 a “
PS0;
” r emot e
-control command via the
RS232 interface, then deactivate the POWER ON
signal. T his sequence ensures that nonvolatile
memory is updated correctly before shut-down.
Automatic Antenna Control
Some antenna control units (e.g., those used with
St eppI R™ ant e nnas ) can t r ac k t he K3’ s ba nd and
f r equency by wat chi ng f or “
IF;
” ( r i g i nf or ma t i on)
packets from the transceiver. Some computer
logging/contesting applications set up the K3 to
output these messages periodically, allowing the
ant enna c ont r ol uni t t o “ea ves dr op. ”
I f you’ r e not us i ng s uch s of t war e, or i f you’ r e not
using a computer at all, you can still set up the K3
t o ou t pu t “
IF;
” pac ke t s per i odi cal l y by s e t t i ng
CONFIG:AUTOINF to
AUTO 1
. T he packets are
sent once per second while the VFO frequency is
being changed, as well as on any band change.
I f you’ r e us i ng l oggi ng/ cont est i ng sof t war e,
che ck with the manufacture r before setting
AUTOINF
to AUTO 1 . Some applications may
not be t ol er ant of unsol i c i t ed “I F; ” pac ket s.
CW/DATA Terminal Applications
The K3 directly supports CW/PSK31/RTT Y ASCII
text transmit and receive via its RS232 port. Our
K3
Utility application includes a simple Terminal
function that lets you try out these modes using
your c omput e r ’ s ke yboar d
and monitor.
You can also use a generic terminal program of any
type to emulate this same functionality. Here are the
low-
l evel comma nds you’ l l need:
Re ceive :
I f a “
TT1;
” ( t ext
-to-terminal) command is
sent to the K3, it will route received and decoded
CW/DAT A text to the a terminal program, in
addi t i on t o s howi ng t he t ext on t he K3’ s
VFO B
display.
Transmit:
Text can be t r ans mi t t ed us i ng “ke yi ng”
packe t s ( e. g. , “
KY {text};
”) . Up t o 24 c har ac t e r s
can be sent in each packet.